Fig. 10. Effects of metergoline (100pmol) on medulla bilateral neuron (MBN)
photo-responsiveness. (A,B) Average intensity—response curve before
(filled circles) and after injection (open circles) of metergoline. Vertical
bars indicate ±1 S.E.M. Metergoline increased the photo-responsiveness
during both day (A) and night (B), but more effectively during the day.
(C—E) Integrated rate histograms illustrating the activity per 100ms.
Serotonin suppressed the light-induced responses (D), but metergoline
attenuated the suppressing effect of serotonin when administered together with
serotonin (E). The white and black bars at the bottom indicate light (white)
and dark (black) periods.
